The set bonus is a 15% increase to your movement speed. This also increases the speed of which you swing your tools, however it does not actually increase the speed of which you mine, cut down trees, or break things. However, armor from this set can be combined with armor from the Ancient Shadow Armor set for the set bonus. When the sets are mixed, the visual blur does not occur.

PvP Uses

Because of Shadow Armor's 21% increase in melee speed and 15% increase in movement speed many players use it for PvP as a Hit and Run armor setup. Cutlass, when reforged and combined with Feral Claws and Shadow Armor, is the fastest hitting melee weapon around.